docs: def close(self):
          """Shut down an SOL session,
          """
          if self.ipmi_session:
              self.ipmi_session.unregister_keepalive(self.keepaliveid)
          if self.activated:
              try:
                  self.ipmi_session.raw_command(netfn=6, command=0x49,
                                                data=(1, 1, 0, 0, 0, 0))
              except exc.IpmiException:
                  # if underlying ipmi session is not working, then
                  # run with the implicit success
                  pass